Hydrous RuO2/carbon black nanocomposites with 3D porous structure by novel incipient wetness method for supercapacitors
Hydrous RuO2/carbon black nanocomposites with 3D porous structure by novel incipient wetness method for supercapacitors
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DOI：
10.1149/1.2140677
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发表时间：
2006-02
影响因子：
3.9
通讯作者：
Myoungki Min;K. Machida;J. Jang;K. Naoi
中科院分区：
文献类型：
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作者：
Myoungki Min;K. Machida;J. Jang;K. Naoi
以气相法二氧化硅纳米粒子为原料，采用新型的初湿法制备了水合RuO 2 /炭黑纳米复合材料，并将其用于超级电容器电极材料。首先，采用溶胶-凝胶法制备了水合RuO 2 /气相二氧化硅/科琴黑（KB）复合材料。将气相法SiO2溶解后，在高负载量（Ru含量为46wt%）为60wt%的情况下，制备出了具有三维多孔结构的水合RuO 2 /KB纳米复合材料，该纳米复合材料由分散在高比表面积KB（1180 m2 g - 1）上的RuO 2纳米颗粒（20-60 nm）组成。水合RuO 2 /KB纳米复合电极的比电容为647 Fg- 1，RuO 2的电荷利用率高达72%.这是显着高于其他工人在类似的RuO 2负荷的报告值。高电容和高电荷利用率可能是由于纳米复合材料的3D多孔结构内的增强的质子路径。
For supercapacitor electrode material, hydrous RuO 2 /carbon black nanocomposites were prepared by the novel incipient wetness method using a fumed silica nanoparticle. First, hydrous RuO 2 /fumed silica/Ketjen black (KB) was synthesized by the sol-gel-based method. After dissolving the fumed silica, the hydrous RuO 2 /KB nanocomposite, which is composed of RuO 2 nanoparticles (20-60 nm) dispersed on the high-surface-area KB (1180 m 2 g - 1 ), was formed with 3D porous structure at high loading of 60 wt % RuO 2 (Ru content is 46 wt %). The hydrous RuO 2 /KB nanocomposite electrode exhibited a specific capacitance of 647 F g - 1 with high charge utilization of RuO 2 (72%). which is significantly higher than reported values by other workers at similar loading of RuO 2 . The high capacitance and the high charge utilization were probably due to enhanced proton paths within the 3D porous structure of the nanocomposite materials.